I don't think the Rubicon will see prices rise, it was never that popular of a knife. I have one that I never carry. It's just too thick, too short, too uncomfortable with a less than ideal blade shape. It also was very expensive for the sum of the parts. Although a good flipper for a Spyderco, its not a great flipper compared to others. I don't sell off knives but the Rubicon is one of the few that I've honestly considered recovering some losses on.
Don't forget, the Rubicon 2 is coming soon at what looks to be a bad street price. $210 for S30V and peel ply CF/G10 seems a little out of touch, although it's a little better than $300 for the original. It does bring a slimmer overall pocket package so from that standpoint it solves some of the problems of the Rubicon. The existence of the Rubicon 2 almost dooms the Rubicon to suppressed value. The 2 is probably a better knife.
But, I do agree that if you like it, get it. Discontinued Spydies tend to sell off fast as soon as the discounts are applied. Looks like BHQ is already out of stock.